德兴市金山金矿田是与赣东北深大断裂带内次一级剪切带有关的中温热液矿床。其矿石类型主要由与断裂充填有关的小尺度石英脉组成,这些石英脉主要呈纹层状。不同尺度的构造研究表明,金山金矿是同构造的产物,递进变形作用与成矿作用密切相关,在成矿过程中,普遍发育压溶作用,导致早期的石英颗粒发生溶解以及形成黄铁矿压力影。金山金矿蚀变硫化物以黄铁矿为主,说明成矿流体中硫主要以H2S和HS^-形式存在。断层阀机制引起压力波动,进而导致成矿流体的相分离和水—岩反应,是金山金矿的主要成矿机制。
The Jinshan gold deposit, the largest gold deposit south of Yangtze River of China, with a reserve of 200 tones, is hosted by the Jinshan ductile shear zone. The shear zone is associated with a magnificent supracrustal Proterozoic mélange--suture zone, i.e. the Northeastern Jiangxi Deep Fault Zone. The shear zone is hosted within a Mesoproterozoic (1300 - 1500 Ma) meta-pyroclastic--turbidite sequence. The mineralized fault-filled quartz veins that are elongated and boudinaged along with mylonitic foliations serve as main ore bodies. Deformation structures observed in the ductile shear zone and the sheared auriferous quartz veins at various scales indicate a syn-deformational mineralization associated with a progressive deformation. The segregation character of the quartz veins is consistent with pervasive and significant pressure solution observed in the shear zone, suggesting an in-situ source of ore fluids. Gold precipitated in response to fluids phase separation and fluid--rock interaction caused by pressure fluctuating as a result of periodic fault-valve activities. It is concluded that the Jinshan deposit is syn-tectonic, the gold mineralization is closely with progressive deformation.